Rechargeable electric battery



H. R. DAM.

RECHARGEABLE ELECTRIC BATTERY.

APPLICATION FILED DEC. 12, 1918.

Patented May 3, 1921.

I lNvENToR I ,ym/'y fas@ d/jdm ATTORNEY ,y UNITED s'rarlas'J "PATENT orifice.

HENRY ROSENDAL DAM, OF BROOKLYN, NEW YORK, ,ASSIGNOR 0F ONE-HALF T0 JOSEPH BLOCK, OF BROOKLYN, NEW YORK.

RECHARGEABLE ELECTRIC Barmenia;y i

Specification of Letters Patent.

Patented M ay 3, 1921.

applicati@ mea December 12, 1918. seriai No. 266,422.

To all whom t may homem.'

" New York, have invented certain new and useful Improvements in Rechargeable Elec.

tric Batteries, of which the .following is a full, clear, and exact description.

This invention relates to improvements in dry batteries and has 4for an object to provide a dry battery'that can be recharged, and which will also act as a reserve cell or a cell that will be inactive as a current generating element until same is to be used. It is well known that dry batteries will deteriorate when not/in use, as for example when stored away for sale in the future, and it ofttimes occurs that dry batteries are found to be lifeless after having stood for some length of time, due to constant chemical action of the elements thereof especially when exposed to dampness or climatic changes. One of the objects of my invention is to obviate this tendency and lalso to provide a dry battery that ca n be recharged.

I will now proceed to describe the manner by which I obtain the above mentioned objects, reference being had to the accompanying drawing forming part hereof, wherein y Figure 1 is a vertical sectional view of mimproved battery, assembled;

ig. 2 is a similar view of one of the component parts thereof;

Fig. 3 is al'o a similar view of-the outer casing and the zinc shell and cap carried thereby;

Fig. 1 is a vertical sectional View of the electrolytic container which forms part of myr invention;

ig. 5 is a sectional plan View, the section being taken on a line 5-5 in Fig. 1;

To carry my invention into practice Iprovide a dry battery consisting of elements which do not become active until assembled for use; that is to say, the elements of. which the battery is composed will be separated or kept apart, until the battery is to be placed 1n use. v

'Referring now to the accompanyingl drawing in which one form of my invention has been illustrated, I provide a battery casing 6 composed of some non-conducting material such as wood, hard rubber or the like, within which is placed a zinc cylinder. or

pencil 19 and supports same.

shell which lis preferably spaced fromy the wall of the casing to provldean air space or jacket 8. The shell 7 vis held in a cylindrical groovev 9 in the bottoml 10 of the casing. The zinc shell is open at both ends, and the the bottom of. the battery. The casing 6 is further provided with a binding-post l1 connected at its inner end to a metal conductor 12 which bears against 'the shell 7. The open end of the casing 6 is threaded as at 13 to engage the threads 14 of a screwcap 15. ,The cap 15 maybe composed of any suitable non-conducting material and is provided with a cylindrical groove 17 to receive the upper end of'the zinc shell 8 when said cap is screwed into vthe casing 6 as shown in Fig. 1.

The screw cap 15'is further provided with a binding-post 18 which engages the carbonl The upper end of thecarbon pencil 19 is inserted in the cap portion 20 of said'bindin -post and held bottom 10'of the casing 6 therefore forms in any desired manner, in t e present ini contains the zinc shell 7 ;l the second comprises the screw cap 15 the carbon pencil 19 and the depolarizing agent 21. The latter unit is provided with a bag, sack or wrapping, indicated by 22 for the depolarizing agent which is preferably granular. The carbon pencil isl embedded in the depolarizing agent 21 which is maintained in mass formation around the pencil by said sack or wrapping 22, which is preferably of cloth or other porous materiah A further element of this unit isthe centralizing element or disk 23 of non-conducting materialsuch as liber, which acts to position the carbon cathode unit-centrally within zinc shell 7 of the anodeunit.

As can be seen in Figfl the diameter of the sack 22 is somewhat less than the inner diameter of the shell 7 to provide a space 24: for the electrolyte. It will also be seen in Fig-1 that the disk 23 fits the interior of the shell 7 and is larger 'in diameter than "the sack 22. Moreover said disk is located between the top of the sack 22 and cap 15 and surrounds the carbon pencil 19. The disk 23 is counterbored to provide a pocket 25 having its bottom 26 perforated as at 27 (see also Fig. 5) for a purpose to be hereafter described. The upper surface of the centralizing disk 23 is in contact with the screw cap 15, while the bottom of said disk contacts with the upper end of the sack 22. The cathode unit or bobbin, indicated generally by A, is secured in position by engag ing the threads of the screw vcap 15 in the threads of the casing 6 and rotatlng the screw cap until it. reaches the limit of its downward movement. The sack 22 will then be located centrally of the shell 7 there- Y. by providing a uniform electrolyte space be- .tween the electrodes.

above described, the battery is incomplete,

When assembled as and inactive. To render the )mits active, it is necessary to introduce an .electrolyte into the space 24 and lnoisten thel depolarizing agent.

The battery when assembled in inactive condition, as above described, may be packed away until needed, without any fear of deterioration of the electrodes, becausethe activating agent or electrolytewhich renders the electrodes active is absent. desirable, the units may 'be packed away separately within the spirit of this invention, as the broad invention is not to be limited to any particular'shipping or storing arrangement of the parts of the battery. c To render the battery elements active it is Y merely necessary to dampen the depolarizing agent and ll the space 24 with the electrolyte. The introduction of the electrolyte forms an important part of my` invention.

.- The third unit of the battery consists of a frangible retainer 28 preferably gelatinousmaterial within. which the electrolyte, indi- Y cated by 29, in paste `form. is placed. The

electrolyte should preferably be about .the

consistency of vaseline and the containershould be designed `to hold enoughof the electrolyte-to completely fill the space 24 between the sack 22 and shell 7. After the l' electrolyte is placed in the container, a cap Aortop 30 will be placedv over the open-end of the container and hermetically sealed to exclude air and moisture from the interior of the container.

and the container 28 is then placed on the bottomlO ofthe casing within the shell. 7. The sack 22 is then placed water for a few minutes to dampen ,the depolarizing agent 21. After this operation has been performed' theunitA is replacedwithin the casing 6, and screwed down by manipulating the cap.

15. The screwing down of the cap will'force lthe sack against the container 28. A con- `in accordance with my To prepare the 'inactive 4battery for use the cathodeor bobbin unit A is first removed tinuation of this operation will .sovflatten the container that it will burst (it being designed to burst under pressure) and the electrolyte will be forced therefrom into the space 24. Should the electrolyte more than ll the space 24, the excess will be forced toA flow through the perforations 27 in the bottom 26 of the centralizing element. 23 into -the pocket 25.

The battery is now fully activated and ready for instantuse.

To render the joint between the screwcap 15 and casing 6 absolutely tight, I rovide a gasket 31 of rubber orz the like. .T e provision of the air space 8 between the zinc shell and casing 6 protects the said shell from dampness, climatic changes, or atmospheric influences, which might tend to injure it and decrease its life.

One of the great advantages of my improved arrangement is that a battery, made improvement, can

be readily recharged. o recharge the battery, it is merely necessary to take the elements apart, wash the zinc shell thoroughly and remove all deleterious salts, after which a new container, charged with fresh or unused electrolyte, can be introduced.

By keeping a supply of electrolyte card tridges or containers on hand, a cell -can be recharged repeatedly. Furthermore,- I believe I am the first to produce a dry battery A that can be taken apart, cleaned andreassembled, and also one that does not contain an active agent whennot in use.

' the same electrodes may be repeatedly used till consumed; Thus, lI secure the maximum economy-in the use ofthe elements of a d cell, thereby enhancing the value of the ce? and vgreatly increasing the length ofits useful life.

Having now described my invention what -I claim is a 1. In a dry cell .of the typedescribed, a tubular anode, a cathode located within lsaid `'tubular anode and spaced therefrom, a casmg surrounding said tubular anode and stantl-Ito f orm a complete and fully active -of the cell can be wasted while the parts are Y' spaced therefrom tov provide. an air-jacket `around said anode, and an electrolyte occupylng the spacel between the tubular anode and the cathode.

Y 2. In ad .cell of the ltype described,an

anode, a cat ode and an electrol tlvatmg sald electrodes, said ano e comprismg la tubular `zinc shell open at both, ends for acand carried by an outer casing, said casing and said zinc shell being spaced from one another to provide an air-jacket around said lshell.

3. In a dry cell adapted to remain inactivel until it is desired to put the cellinto use, a casing open at'the top, a cap detach ably fitting the open top of the casing, a

,tubular anode detachably supported upon the bottom of said casing andl spaced from the sides thereof, acathode detachably carvzinc shell having its lower end-supported in said groove;

5. An anode unit for a dry cell comprising a cup of non-conducting material, and a zine' shell cylindrically supported on the bottom of said cup, said shell being spaced lfrom the side walls of thepcup leavinga substantial air space therebetween.

6. In a dry cell Aoi the type described, a cylindrical anode element, a cathode element located therewithin, means to centralize the cathode element within 'said anode,

said4 centralizing means being carried at: the l upper end of said electrodes and comprising an annular disk having a series of perfora- :tions therein. 1 7. I n a dry cell ofthe type adapted to re- V main inactive until it is desired to Y utytlie cell into use, a cathode unit an-ano e unit 'including` a container, and an activating 'unit initially maintained separate from said Signed at New York citv.

day of December, 1918. l HENRY RQSENDAL DAM. g I

cathode and anode units, said activatin unit comprising a frangible air tight, cylin ical container carrying a supply of activating aste. v e P 8. In a'dry cell of the type described, an anode, a cathode and an auxiliary frangi'ble receptacle containing paste for activating said cell, an outer container :for said electrodes and paste, a detachable cover for said container, said anode and cathode being detachably supported within said container and cap, said frangible receptacle being initially located outside of said container whereby said cell will remain wholly 1nactive until it is desired to put it into use,

and maybe replenished after it has become depleted by use.

9. In a dry cell adapted to remain inactivev until it is desired to put the cell into v use, a cup-shaped casing of insulating material having a centrahzmg circular groove on the bottom thereof,` a cap detachably fitted in the top of said casingand having a circular groove in alinement with the groove in the bottom of the lcasin a cathode,ra cylindrical zinc tubular ano e open at'both ends itting within said grooves, and means for activating, the cell.

10. In a dry cell of the typel described an outer casing of non-conducting material,

said casing carryin a detachable zinc tubu-v lar anode therewitin and being'provided with a detachable cover, said cover carrying a detachable cathode, and means for activatiiig the cell initially detached from the other elements of said cell.

N. Y.. this 3rd Witnesses:

'-Enwm A.`J.mv1s, Bmna' HOLEN. 

